INFO: task syz.0.797:6697 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.797 state:D stack:28688 pid:6697 ppid:4275 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
rwsem_down_write_slowpath+0xc2e/0x1110 kernel/locking/rwsem.c:1189
lock_rename include/linux/fs.h:-1 [inline]
do_renameat2+0x435/0xce0 fs/namei.c:4974
__do_sys_rename fs/namei.c:5081 [inline]
__se_sys_rename fs/namei.c:5079 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:5079
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fbf4f79bf79
RSP: 002b:00007fbf50578028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fbf4fa16090 RCX: 00007fbf4f79bf79
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000200000000580
RBP: 00007fbf4f8327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbf4fa16128 R14: 00007fbf4fa16090 R15: 00007ffd999f9dd8
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2dfb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2e7d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by getty/4027:
#0: ffff88814d0e9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x429/0x1390 drivers/tty/n_tty.c:2198
2 locks held by kworker/u4:8/4969:
4 locks held by syz.0.797/6669:
2 locks held by syz.0.797/6697:
#0: ffff88801eb8c460 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:402
#1: ffff888072bdb510 (&sb->s_type->i_mutex_key#24/1){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline]
#1: ffff888072bdb510 (&sb->s_type->i_mutex_key#24/1){+.+.}-{3:3}, at: do_renameat2+0x435/0xce0 fs/namei.c:4974
1 lock held by dhcpcd-run-hook/10236:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Call Trace:
<TASK>
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3e6/0x460 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x418/0x770 kernel/locking/lockdep.c:4316
Code: 52 6f 00 48 ba 00 00 00 00 00 fc ff df eb 8c 48 c7 c7 a0 23 8c 8a e8 f7 9d c8 08 48 ba 00 00 00 00 00 fc ff df b8 ff ff ff ff <65> 0f c1 05 60 6c 9e 7e 83 f8 01 48 8b 5c 24 18 75 34 48 c7 44 24
RSP: 0018:ffffc90000107a00 EFLAGS: 00000086
RAX: 00000000ffffffff RBX: ffff88813fec4658 RCX: adfc0d9ca46b8b00
RDX: dffffc0000000000 RSI: ffffffff8a8c23a0 RDI: ffffffff8adf0d20
RBP: ffffc90000107aa8 R08: ffffffff90af532f R09: 1ffffffff215ea65
R10: dffffc0000000000 R11: fffffbfff215ea66 R12: ffff88813fec4720
R13: 0000000000000004 R14: 1ffff11027fd88cb R15: ffff88813fec4700
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fec5cab5ff8 CR3: 00000000277d5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
__local_bh_enable_ip+0x136/0x1c0 kernel/softirq.c:426
spin_unlock_bh include/linux/spinlock.h:396 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline]
nsim_dev_trap_report_work+0x763/0xaf0 drivers/net/netdevsim/dev.c:851
process_one_work+0x8a2/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1270 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
vkms_vblank_simulate: vblank timer overrun